Method

First of all, sift the flour into a large, roomy mixing bowl.

Then add the butter and rub it into the flour until the mixture resembles breadcrumbs (you can do this stage in a food processor, if you like). Next, stir in the sugar, chopped bananas and the chocolate (don’t be alarmed, it will look like a crumble mix). Now press the mixture evenly into the greased and lined tin and bake it on the middle shelf of the pre-heated oven for 35-40 minutes or until it is firm to touch in the centre and lightly golden.

Leave the slice in the tin until it is cold. While the slice is cooling, make the topping by mixing all the ingredients in a bowl until light and fluffy, then cover with clingfilm and chill until needed. To finish, remove the slice from the tin to a wire rack, spread the chilled topping over, dust lightly with cocoa powder, if you like, and cut it into 12 pieces.

Have you seen...

When it comes to origin and tradition, the Italians know the value of their culinary heritage with each region celebrating the produce its rightly famous for. But how do you know you're buying the real deal?

The key is to look for the distinctive red and yellow PDO mark - Protected Designation of Origin. It’s your guarantee of authentic regional flavour, perfected over centuries and made to exacting traditional standards.